Fault ride-through control device and method
A fault ride-through and control device technology, applied in control systems, circuit devices, control generators, etc., can solve problems such as increased failure rate of braking units, inability to release energy, uncontrollable power grid operation status, etc., to ensure safety, The effect of slowing down the aging rate
Active Publication Date: 2020-10-09
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] However, the inventors of the present application found that due to the uncontrollable operation state of the power grid, the IGBT module and the braking resistor in the braking unit may need to operate under heavy load for a long time, which will increase the failure rate of the braking unit , and once the brake unit fails, it will not be able to release the excess energy on the DC bus, which will affect the safe operation of the wind turbine
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0048] Features and exemplary embodiments of various aspects of embodiments of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention.
[0049] Embodiments of the present invention provide a fault ride-through control device and method. Using the method in the embodiment of the present invention can prevent the braking unit of the converter from running under heavy load for a long time, thereby reducing the failure rate of the braking unit, and the power grid fails, such as unbalanced drop or rise, voltage waveform distortion, etc. In case of serious abnormality, it can ensure that the grid-connected current of the wind turbine is completely controllable, making the system have good grid-connected friendliness.
[0050] figure 1 It is a schematic diagram of the grid-connected structure of the wind power generating set p...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The embodiment of the invention discloses a fault ride-through control device and a method thereof. The method comprises the following steps that a first feedback regulation module outputs a pulse width modulation PWM signal for driving an IGBT in a machine side boost circuit of a converter according to a boost current measured value and an initial boost current set value; a control module judgeswhether a power grid voltage meets a preset drop condition or not according to a three-phase voltage signal of the power grid, and controls the circuit between a second feedback regulation module andthe first feedback regulation module to be connected when the power grid voltage meets the preset drop condition; and the second feedback regulation module also regulates the initial boost current setvalue according to an error signal between the measured value of a direct current bus voltage and the set value of the direct current bus voltage, so that the first feedback regulation module outputsan updated PWM signal. By adopting the technical scheme in the embodiment of the invention, the brake unit can be prevented from long-time heavy-load operation, and the failure rate of the brake unitis reduced.
Description
technical field [0001] The invention relates to the technical field of wind power generation, in particular to a fault ride-through control device and method. Background technique [0002] After rectification, the power generated by wind turbines needs to be connected to the grid through a converter. When the grid operation is unstable, for example, when the grid voltage rises or falls and other grid faults occur, the energy connected to the grid will decrease, and the decrease in the energy integrated into the grid will cause the generator outlet voltage to rise rapidly, thereby making the rectified voltage However, the output power of the wind turbine remains unchanged for the time being. The imbalance of the input and output energy of the converter will cause the DC bus voltage to rise rapidly, affecting the safe operation of the wind turbine. [0003] In order to ensure the safe operation of the wind power generating set, the method in the prior art is to install a brak...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/24H02J3/50H02P9/00H02P9/30
CPCH02J3/24H02J3/386H02J3/50H02P9/006H02P9/30Y02E10/76
Inventor 李峰杨志千敬双
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD